pcbnew: Don't reset router settings when breaking a track

Calling Init() in an action routine will reset the router
settings to the state they were in when first starting pcbnew.
The Init() function is automatically called when the tool is created.

Fixes: lp:1843810
* https://bugs.launchpad.net/kicad/+bug/1843810

pcbnew/router/router_tool.cpp

@@ -1236,7 +1236,6 @@ int ROUTER_TOOL::InlineBreakTrack( const TOOL_EVENT& aEvent )
     if( item->Type() != PCB_TRACE_T )
         return 0;
 
-    Init();
     Activate();
 
     m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );