src/sap.ui.core/src/sap/ui/dom/jquery/Aria.js
function removeFromAttributeList(sAttribute, sValue) {
		var sAttributes = this.attr(sAttribute) || "",
			aAttributes = sAttributes.split(" "),
			iIndex = aAttributes.indexOf(sValue);

		if (iIndex == -1) {
			return this;
		}

		aAttributes.splice(iIndex, 1);
		if (aAttributes.length) {
			this.attr(sAttribute, aAttributes.join(" "));
		} else {
			this.removeAttr(sAttribute);
		}

		return this;
	}
function removeFromAttributeList(sAttribute, sValue) {
		var sAttributes = this.attr(sAttribute) || "",
			aAttributes = sAttributes.split(" "),
			iIndex = aAttributes.indexOf(sValue);

		if (iIndex == -1) {
			return this;
		}

		aAttributes.splice(iIndex, 1);
		if (aAttributes.length) {
			this.attr(sAttribute, aAttributes.join(" "));
		} else {
			this.removeAttr(sAttribute);
		}

		return this;
	}
function removeFromAttributeList ( sAttribute , sValue ) { var sAttributes = this . attr ( sAttribute ) || "" , aAttributes = sAttributes . split ( " " ) , iIndex = aAttributes . indexOf ( sValue ) ; if ( iIndex == - 1 ) { return this ; } aAttributes . splice ( iIndex , 1 ) ; if ( aAttributes . length ) { this . attr ( sAttribute , aAttributes . join ( " " ) ) ; } else { this . removeAttr ( sAttribute ) ; } return this ; }
Remove space separated value from the given attribute.

@this {jQuery} jQuery context
@param {string} sAttribute The name of the attribute.
@param {string} sValue The value of the attribute to be inserted.
@return {jQuery} <code>this</code> to allow method chaining.
@author SAP SE
@function
@private
Remove space separated value from the given attribute .