[lldb][NFC] Remove unused prompt variable in TestMultilineCompletion.py

llvm-svn: 370570

lldb/packages/Python/lldbsuite/test/expression_command/multiline-completion/TestMultilineCompletion.py

@@ -15,8 +15,6 @@ class MultilineCompletionTest(PExpectTest):
         """Test that we can complete a simple multiline expression"""
         self.build()
 
-        prompt = "(lldb) "
-
         self.launch(executable=self.getBuildArtifact("a.out"))
         self.expect("b main", substrs=["Breakpoint 1", "address ="])
         self.expect("run", substrs=["stop reason ="])