Removed deprecated and unused FormFieldValidator.NonNegativeInteger (#11176)

Author: StefanSpieker

core/src/main/java/hudson/util/FormFieldValidator.java

@@ -633,31 +633,4 @@ protected void fail() throws IOException, ServletException {
             error(errorMessage);
         }
     }
-
-    /**
-     * Verifies that the {@code value} parameter is an integer ≥ 0.
-     *
-     * @since 1.282
-     * @deprecated as of 1.294
-     *      Use {@link FormValidation#validateNonNegativeInteger(String)}
-     */
-    @Deprecated
-    public static class NonNegativeInteger extends FormFieldValidator {
-        public NonNegativeInteger() {
-            super(null);
-        }
-
-        @Override
-        protected void check() throws IOException, ServletException {
-            try {
-                String value = request.getParameter("value");
-                if (Integer.parseInt(value) < 0)
-                    error(hudson.model.Messages.Hudson_NotAPositiveNumber());
-                else
-                    ok();
-            } catch (NumberFormatException e) {
-                error(hudson.model.Messages.Hudson_NotANumber());
-            }
-        }
-    }
 }