ClangTools: Fix compiler warning

warning C4101: 'e': unreferenced local variable

Change-Id: Ic09058a9caa845b5dee7e356e7a53899ba87e7f0
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/clangtools/inlinesuppresseddiagnostics.cpp

@@ -46,7 +46,7 @@ void InlineSuppressedDiagnostics::fromString(const QString &input)
                 break;
             }
         }
-    } catch (const ParseError &e) {
+    } catch (const ParseError &) {
         m_parsedStartOffset = -1;
         m_parsedEndOffset = -1;
         m_parseError = true;