Revert "compiler: Allow texture unit bindings to also set sampler index"

This reverts commit c33ac9267a70115c29f97eb20966de4c9aed6938.
diff --git a/icd/intel/compiler/shader/linker.cpp b/icd/intel/compiler/shader/linker.cpp
index fd23997..a55c7c6 100644
--- a/icd/intel/compiler/shader/linker.cpp
+++ b/icd/intel/compiler/shader/linker.cpp
@@ -2590,7 +2590,7 @@
       goto done;
 
    update_array_sizes(prog);
-   link_assign_uniform_locations(prog, ctx->API == API_XGL);
+   link_assign_uniform_locations(prog);
    link_assign_atomic_counter_resources(ctx, prog);
    store_fragdepth_layout(prog);