Revert "Additional checks to prevent errors during atypical use"

This reverts commit 419b1ab.
#1 (comment)

src/plugin/leaflet.canvas-markers.js

@@ -288,8 +288,7 @@ function layerFactory(L) {
             );
         },
         _searchPoints: function (point) {
-            if (this._markers)
-                return this._markers.search({ minX: point.x, minY: point.y, maxX: point.x, maxY: point.y });
+            return this._markers.search({ minX: point.x, minY: point.y, maxX: point.x, maxY: point.y });
         },
         on: function (types, fn, context) {
             var internal = ['click', 'mouseover', 'mouseout']; // TODO
@@ -557,10 +556,8 @@ function layerFactory(L) {
         },
         _removeGeneric: function (val, compareFn)
         {
-            if (this._latlngMarkers) {
-                this._latlngMarkers.remove(val, compareFn);
-                this._latlngMarkers.total--;
-            }
+            this._latlngMarkers.remove(val, compareFn);
+            this._latlngMarkers.total--;
         },
         addTo: function (map) {
             map.addLayer(this);