glsl/main: remove unused params and make function static

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>

src/compiler/glsl/builtin_functions.cpp

@@ -956,7 +956,7 @@ builtin_builder::create_shader()
     * GLSL utility code that could be linked against any stage, so just
     * arbitrarily pick GL_VERTEX_SHADER.
     */
-   shader = _mesa_new_shader(NULL, 0, MESA_SHADER_VERTEX);
+   shader = _mesa_new_shader(0, MESA_SHADER_VERTEX);
    shader->symbols = new(mem_ctx) glsl_symbol_table;
 
    gl_ModelViewProjectionMatrix =

src/compiler/glsl/standalone_scaffolding.cpp

@@ -68,12 +68,10 @@ _mesa_shader_debug(struct gl_context *, GLenum, GLuint *,
 }
 
 struct gl_shader *
-_mesa_new_shader(struct gl_context *ctx, GLuint name, gl_shader_stage stage)
+_mesa_new_shader(GLuint name, gl_shader_stage stage)
 {
    struct gl_shader *shader;
 
-   (void) ctx;
-
    assert(stage == MESA_SHADER_FRAGMENT || stage == MESA_SHADER_VERTEX);
    shader = rzalloc(NULL, struct gl_shader);
    if (shader) {

src/compiler/glsl/standalone_scaffolding.h

@@ -42,7 +42,7 @@ _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
                        struct gl_shader *sh);
 
 extern "C" struct gl_shader *
-_mesa_new_shader(struct gl_context *ctx, GLuint name, gl_shader_stage stage);
+_mesa_new_shader(GLuint name, gl_shader_stage stage);
 
 extern "C" struct gl_linked_shader *
 _mesa_new_linked_shader(gl_shader_stage stage);