[INTERNAL] sap.m.MessageToast: IE9 IE10 code cleanup
[INTERNAL] sap.m.MessageToast: IE9 IE10 code cleanup

Change-Id: I7e5e67948bd5358f43b6ca3acb3a251bc0babbaf
JIRA: BGSOFUIRILA-2135

SAP/openui5,SAP/openui5,SAP/openui5,cschuff/openui5,cschuff/openui5,SAP/openui5,cschuff/openui5