Some additional cleanup

core/client.js

@@ -87,13 +87,8 @@ function Client(/*input, output*/) {
     this.lastActivityTime   = Date.now();
     this.menuStack          = new MenuStack(this);
     this.acs                = new ACS( { client : this, user : this.user } );
-    this.mciCache           = {};
     this.interruptQueue     = new UserInterruptQueue(this);
 
-    this.clearMciCache = function() {
-        this.mciCache = {};
-    };
-
     Object.defineProperty(this, 'currentTheme', {
         get : () => {
             if (this.currentThemeConfig) {

core/servers/login/ssh.js

@@ -231,8 +231,6 @@ function SSHClient(clientConn) {
         if(termHeight > 0 && termWidth > 0) {
             self.term.termHeight = termHeight;
             self.term.termWidth = termWidth;
-
-            self.clearMciCache();   //  term size changes = invalidate cache
         }
 
         if(_.isString(info.term) && info.term.length > 0 && 'unknown' === self.term.termType) {

core/servers/login/telnet.js

@@ -128,7 +128,7 @@ class TelnetClient {
                                 const value = parseInt(getValue(what));
                                 if (value) {
                                     this.term[what === 'ROWS' ? 'termHeight' : 'termWidth'] = value;
-                                    this.clearMciCache();
+
                                     this._logDebug(
                                         { [ what ] : value, source : 'NEW-ENVIRON' },
                                         'Window size updated'
@@ -157,8 +157,6 @@ class TelnetClient {
                             this.term.env.ROWS = height;
                         }
 
-                        this.clearMciCache();
-
                         this._logDebug(
                             { width, height, source : 'NAWS' },
                             'Windows size updated'