treewide: Cleanup unused structs

vk/wsi: Remove unused struct 'wsi_headless_format'

'wsi_headless_format' appears unused, and seems
to have been since initial commit.

radv: Remove unused struct 'blit_region'

'blit_region' appears unused, I think since initial commit.

r600: Remove unused structs

'eg_interp' and 'r600_shader_src' are unused.
I think they are just leftovers from the cleanup
in 20e6c31ba6.

i915: Remove unused struct 'i915_tracked_hw_state'

'i915_tracked_hw_state' appears unused. I think it's just
a leftover from 179cb58795.

llvmpipe: Remove unused struct 'linear_interp'

'linear_interp' doesn't ever seem to have been used.

radeonsi: Remove unused struct 'texture_orig_info'

'texture_orig_info' seems unused, I think since 46b2b3bda8.

svga: Remove unused struct 'svga_3d_invalidate_gb_image'

'svga_3d_invalidate_gb_image' appears unused since 1942c06f9c.
Remove it.

nir: Remove unused struct 'split_struct_state'

'split_struct_state' looks unused since the original commit.

Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29105>

src/amd/vulkan/meta/radv_meta_blit.c

@@ -9,13 +9,6 @@
 #include "vk_command_pool.h"
 #include "vk_common_entrypoints.h"
 
-struct blit_region {
-   VkOffset3D src_offset;
-   VkExtent3D src_extent;
-   VkOffset3D dst_offset;
-   VkExtent3D dst_extent;
-};
-
 static VkResult build_pipeline(struct radv_device *device, VkImageAspectFlagBits aspect, enum glsl_sampler_dim tex_dim,
                                VkFormat format, VkPipeline *pipeline);
 

src/compiler/nir/nir_split_per_member_structs.c

@@ -24,12 +24,6 @@
 #include "nir.h"
 #include "nir_deref.h"
 
-struct split_struct_state {
-   void *dead_ctx;
-
-   struct hash_table *var_to_member_map;
-};
-
 static nir_variable *
 find_var_member(struct nir_variable *var, unsigned member,
                 struct hash_table *var_to_member_map)

src/gallium/drivers/i915/i915_state_emit.c

@@ -40,13 +40,6 @@
 #include "util/u_math.h"
 #include "util/u_memory.h"
 
-struct i915_tracked_hw_state {
-   const char *name;
-   void (*validate)(struct i915_context *, unsigned *batch_space);
-   void (*emit)(struct i915_context *);
-   unsigned dirty, batch_space;
-};
-
 static void
 validate_flush(struct i915_context *i915, unsigned *batch_space)
 {

src/gallium/drivers/llvmpipe/lp_state_fs_linear.c

@@ -63,15 +63,6 @@ struct nearest_sampler {
 };
 
 
-struct linear_interp {
-   alignas(16) uint32_t out[64];
-   __m128i a0;
-   __m128i dadx;
-   __m128i dady;
-   int width;                   /* rounded up to multiple of 4 */
-   bool is_constant;
-};
-
 /* Organize all the information needed for blending in one place.
  * Could have blend function pointer here, but we currently always
  * know which one we want to call.

src/gallium/drivers/r600/r600_shader.c

@@ -331,22 +331,6 @@ void r600_pipe_shader_destroy(struct pipe_context *ctx UNUSED, struct r600_pipe_
 		free(shader->shader.arrays);
 }
 
-struct r600_shader_src {
-	unsigned				sel;
-	unsigned				swizzle[4];
-	unsigned				neg;
-	unsigned				abs;
-	unsigned				rel;
-	unsigned				kc_bank;
-	bool					kc_rel; /* true if cache bank is indexed */
-	uint32_t				value[4];
-};
-
-struct eg_interp {
-	bool					enabled;
-	unsigned				ij_index;
-};
-
 struct r600_shader_ctx {
 	unsigned				type;
 	unsigned				temp_reg;

src/gallium/drivers/radeonsi/si_blit.c

@@ -931,16 +931,6 @@ void si_decompress_subresource(struct pipe_context *ctx, struct pipe_resource *t
    }
 }
 
-struct texture_orig_info {
-   unsigned format;
-   unsigned width0;
-   unsigned height0;
-   unsigned npix_x;
-   unsigned npix_y;
-   unsigned npix0_x;
-   unsigned npix0_y;
-};
-
 void si_resource_copy_region(struct pipe_context *ctx, struct pipe_resource *dst,
                              unsigned dst_level, unsigned dstx, unsigned dsty, unsigned dstz,
                              struct pipe_resource *src, unsigned src_level,

src/gallium/drivers/svga/svga_resource_buffer_upload.c

@@ -30,12 +30,6 @@ struct svga_3d_update_gb_image {
    SVGA3dCmdUpdateGBImage body;
 };
 
-struct svga_3d_invalidate_gb_image {
-   SVGA3dCmdHeader header;
-   SVGA3dCmdInvalidateGBImage body;
-};
-
-
 static void
 svga_buffer_upload_ranges(struct svga_context *, struct svga_buffer *);
 

src/vulkan/wsi/wsi_common_headless.c

@@ -38,11 +38,6 @@
 
 #include "drm-uapi/drm_fourcc.h"
 
-struct wsi_headless_format {
-   VkFormat        format;
-   struct u_vector modifiers;
-};
-
 struct wsi_headless {
    struct wsi_interface base;