glsl: Remove EmitNoLoops and the associated lower_jumps(lower_break=true) code.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8044>

src/compiler/glsl/lower_blend_equation_advanced.cpp

@@ -471,7 +471,7 @@ lower_blend_equation_advanced(struct gl_linked_shader *sh, bool coherent)
    /* Lower early returns in main() so there's a single exit point
     * where we can insert our lowering code.
     */
-   do_lower_jumps(sh->ir, false, false, true, false, false);
+   do_lower_jumps(sh->ir, false, false, true, false);
 
    void *mem_ctx = ralloc_parent(sh->ir);