refactor(input): remove ionic vars file

Author: brandyscarney

core/src/components/input/input.ionic.scss

@@ -1,6 +1,5 @@
 @use "../../themes/ionic/ionic.globals.scss" as globals;
 @import "./input";
-@import "./input.ionic.vars";
 @import "./input.ionic.outline.scss";
 
 // Ionic Input