glsl: Stop force-enabling compute shaders

This isn't needed since we no longer use the GLSL compiler in Vulkan.

src/compiler/glsl/glsl_parser_extras.cpp

@@ -86,8 +86,6 @@ _mesa_glsl_parse_state::_mesa_glsl_parse_state(struct gl_context *_ctx,
 
    this->extensions = &ctx->Extensions;
 
-   this->ARB_compute_shader_enable = true;
-
    this->Const.MaxLights = ctx->Const.MaxLights;
    this->Const.MaxClipPlanes = ctx->Const.MaxClipPlanes;
    this->Const.MaxTextureUnits = ctx->Const.MaxTextureUnits;