Revert "[flang][cuda][driver] Make sure flang does not switch to cc1" (#104632)

Reverts #104613

Author: clementval

clang/lib/Driver/Types.cpp

@@ -170,9 +170,6 @@ bool types::isAcceptedByFlang(ID Id) {
   case TY_LLVM_IR:
   case TY_LLVM_BC:
     return true;
-  case TY_PP_CUDA:
-  case TY_CUDA:
-    return true;
   }
 }
 

flang/test/Driver/cuda-option.f90

@@ -1,6 +1,5 @@
 ! Test -fcuda option
 ! RUN: %flang_fc1 -cpp -x cuda -fdebug-unparse %s -o - | FileCheck %s
-! RUN: not %flang -cpp -x cuda %s -o - 2>&1 | FileCheck %s --check-prefix=MLIRERROR
 ! RUN: not %flang_fc1 -cpp %s -o - 2>&1 | FileCheck %s --check-prefix=ERROR
 program main
 #if _CUDA
@@ -13,8 +12,4 @@ program main
 ! CHECK: INTEGER :: var = 1
 ! CHECK: INTEGER, DEVICE :: dvar
 
-! ERROR: cuda-option.f90:{{.*}}:{{.*}}: error: expected end of statement
-
-! The whole pipeline is not in place yet. It will currently fail at MLIR
-! translation level.
-! MLIRERROR: failed to legalize operation 'cuf.alloc'
+! ERROR: cuda-option.f90:8:19: error: expected end of statement