glsl: Remove useless ir_shader enumeration value.

src/glsl/ast_to_hir.cpp

@@ -1785,11 +1785,7 @@ apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual,
 	    string = "output";
 	 }
 	 break;
-
-      case ir_shader:
-	 assert(!"Should not get here.");
-	 break;
-      }
+      };
 
       if (fail) {
 	 _mesa_glsl_error(loc, state,

src/glsl/glsl_parser_extras.cpp

@@ -88,7 +88,6 @@ _mesa_glsl_shader_target_name(enum _mesa_glsl_parser_targets target)
    case vertex_shader:   return "vertex";
    case fragment_shader: return "fragment";
    case geometry_shader: return "geometry";
-   case ir_shader:       break;
    }
 
    assert(!"Should not get here.");

src/glsl/glsl_parser_extras.h

@@ -37,8 +37,7 @@
 enum _mesa_glsl_parser_targets {
    vertex_shader,
    geometry_shader,
-   fragment_shader,
-   ir_shader
+   fragment_shader
 };
 
 struct gl_context;

src/glsl/ir_variable.cpp

@@ -504,9 +504,5 @@ _mesa_glsl_initialize_variables(exec_list *instructions,
    case fragment_shader:
       initialize_fs_variables(instructions, state);
       break;
-   case ir_shader:
-      fprintf(stderr, "ir reader has no builtin variables");
-      exit(1);
-      break;
    }
 }