Revert "[Parse] Implementation for SE-200 (raw strings)"

test/Parse/raw_string_errors.swift

@@ -1,14 +0,0 @@
-// RUN: %target-typecheck-verify-swift
-
-#"\##("invalid")"#
-// expected-error@-1{{too many '#' characters in delimited escape}}
-// expected-error@-2{{invalid escape sequence in literal}}
-
-####"invalid"###
-// expected-error@-1{{unterminated string literal}}
-
-###"invalid"####
-// expected-error@-1{{too many '#' characters in closing delimiter}}
-// expected-error@-2{{consecutive statements on a line must be separated by ';'}}
-// expected-error@-3{{expected expression}}
-// expected-warning@-4{{string literal is unused}}