Debugger: Remove unused UpdateParameters::tooltipExpression member

Change-Id: I61360b151ac8e6181b0635437468b4cd897c9ee8
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/debugger/gdb/gdbengine.cpp

@@ -3684,7 +3684,6 @@ bool GdbEngine::setToolTipExpression(TextEditor::TextEditorWidget *editor,
     UpdateParameters params;
     params.tryPartial = true;
     params.tooltipOnly = true;
-    params.tooltipExpression = context.expression;
     params.varList = context.iname;
     updateLocalsPython(params);
     return true;

src/plugins/debugger/lldb/lldbengine.cpp

@@ -789,7 +789,6 @@ bool LldbEngine::setToolTipExpression(TextEditor::TextEditorWidget *editorWidget
     UpdateParameters params;
     params.tryPartial = true;
     params.tooltipOnly = true;
-    params.tooltipExpression = context.expression;
     params.varList = context.iname;
     doUpdateLocals(params);
 

src/plugins/debugger/watchhandler.h

@@ -160,7 +160,6 @@ public:
     bool tryPartial;
     bool tooltipOnly;
     QByteArray varList;
-    QString tooltipExpression;
 };
 
 typedef QHash<QString, QStringList> DumperTypeFormats; // Type name -> Dumper Formats