Revert "Merge pull request #8858 from vonchenplus/mipmap"

This reverts commit 38e4382f53, reversing
changes made to 37de88040c.

src/shader_recompiler/backend/spirv/spirv_emit_context.h

@@ -243,9 +243,6 @@ public:
     u32 texture_rescaling_index{};
     u32 image_rescaling_index{};
 
-    Id render_area_push_constant{};
-    u32 render_are_member_index{};
-
     Id local_memory{};
 
     Id shared_memory_u8{};
@@ -321,7 +318,6 @@ private:
     void DefineRescalingInput(const Info& info);
     void DefineRescalingInputPushConstant();
     void DefineRescalingInputUniformConstant();
-    void DefineRenderArea(const Info& info);
 
     void DefineInputs(const IR::Program& program);
     void DefineOutputs(const IR::Program& program);