fix: remove unused string, rename string

src/app/strings.ts

@@ -4,7 +4,7 @@ export const strings = Object.freeze({
   addContact: 'add a contact',
   allFieldRequired: 'all fields are required',
   company: 'company',
-  constacts: 'contacts',
+  contacts: 'contacts',
   contactsName: "Contact's name",
   contactsCompany: "Contact's company",
   contactsPhone: "Contact's phone",
@@ -12,7 +12,6 @@ export const strings = Object.freeze({
   editContact: 'edit contact',
   editTheContact: 'edit the contact',
   errorMessageMaxLength: (maxLen: number) => `Must be ${maxLen} characters or fewer.`,
-  errorMessageMinLength: (minLen: number) => `Must be at least ${minLen} characters long.`,
   errorMessagePhonePattern: `Valid format: + (optional) plus 12 to 15 digits`,
   errorMessageRequired: 'This field is required.',
   name: 'name',