Remove dead code

Since we have CompUnitRepo objects living in @*INC, I don't see how this could
ever work.  Removal does not seem to break anything at all in spectesting.

src/Perl6/ModuleLoader.nqp

@@ -36,20 +36,6 @@ class Perl6::ModuleLoader does Perl6::ModuleLoaderVMConfig {
     }
 
     method search_path() {
-        # See if we have an @*INC set up, and if so just use that.
-        my $PROCESS := nqp::gethllsym('perl6', 'PROCESS');
-        if !nqp::isnull($PROCESS) && nqp::existskey($PROCESS.WHO, '@INC') {
-            my $INC := ($PROCESS.WHO)<@INC>;
-            if nqp::defined($INC) {
-                my @INC := $INC.FLATTENABLE_LIST();
-                if +@INC {
-                    return @INC;
-                }
-            }
-        }
-
-        # Too early to have @*INC; probably no setting yet loaded to provide
-        # the PROCESS initialization.
         my @search_paths;
         @search_paths.push('.');
         @search_paths.push('blib');