[Fix] Remove unnecessary err variable from processing loop

Author: nikitaeverywhere

package.json

@@ -5,7 +5,7 @@
   "printableName": "Cache Web Terminal",
   "description": "Web-based terminal emulator for Caché administering.",
   "author": "ZitRo",
-  "version": "4.7.2",
+  "version": "4.7.3",
   "gaID": "UA-83005064-2",
   "releaseNumber": 26,
   "scripts": {

src/cls/WebTerminal/Core.cls

@@ -340,12 +340,14 @@ ClassMethod Loop(startupRoutine As %String = "") As %Status
     if (startupRoutine '= "") {
         return ..StartupRoutine(startupRoutine)
     }
-    kill // Kill any temporary variables ProcedureBlock may have. Keep procedure block free of vars
+    kill // Kill any temporary variables ProcedureBlock may have.
+    // Procedure block will hold only user-defined variables, so any declarations here may
+    // potentially influence user experience. Do not add any set expressions in this procedure block
     for {
         do ..StartExecMode()
         try {
             xecute ..WaitCommand()
-        } catch err {
+        } catch {
             do ..EndExecMode($ZERROR)
             continue
         }