Remove unnecessary #ifdef in credentials code

src/core/lib/security/credentials/google_default/credentials_generic.c

@@ -33,8 +33,6 @@
 
 #include "src/core/lib/security/credentials/google_default/google_default_credentials.h"
 
-#ifdef GRPC_GOOGLE_CREDENTIALS_GENERIC
-
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
@@ -54,5 +52,3 @@ char *grpc_get_well_known_google_credentials_file_path_impl(void) {
   gpr_free(base);
   return result;
 }
-
-#endif /* GRPC_GOOGLE_CREDENTIALS_GENERIC */

src/core/lib/security/credentials/google_default/google_default_credentials.h

@@ -47,13 +47,11 @@
 #define GRPC_GOOGLE_CREDENTIALS_PATH_SUFFIX \
   GRPC_GOOGLE_CLOUD_SDK_CONFIG_DIRECTORY    \
   "/" GRPC_GOOGLE_WELL_KNOWN_CREDENTIALS_FILE
-#define GRPC_GOOGLE_CREDENTIALS_GENERIC 1
 #else
 #define GRPC_GOOGLE_CREDENTIALS_PATH_ENV_VAR "HOME"
 #define GRPC_GOOGLE_CREDENTIALS_PATH_SUFFIX         \
   ".config/" GRPC_GOOGLE_CLOUD_SDK_CONFIG_DIRECTORY \
   "/" GRPC_GOOGLE_WELL_KNOWN_CREDENTIALS_FILE
-#define GRPC_GOOGLE_CREDENTIALS_GENERIC 1
 #endif
 
 void grpc_flush_cached_google_default_credentials(void);