feat: remove error for partial path templating (#262)

Purpose:
- Partial path templating is not disallowed in OAS3, so although partial path templating may not be ideal style, do not want it to be an error.

Changes:
- Remove code that checks for partial path templating.

Tests:
- Remove tests that test partial path template validation code.

src/plugins/validation/2and3/semantic-validators/paths.js

@@ -11,9 +11,6 @@
 // Paths must have unique (name + in combination) parameters
 
 // Assertation 5:
-// Paths cannot have partial templates. (/path/abc{123} is illegal)
-
-// Assertation 6:
 // Paths cannot have literal query strings in them.
 // Handled by the Spectral rule, path-not-include-query
 
@@ -43,20 +40,6 @@ module.exports.validate = function({ resolvedSpec }) {
       return;
     }
 
-    pathName.split('/').map(substr => {
-      // Assertation 5
-      if (
-        templateRegex.test(substr) &&
-        substr.replace(templateRegex, '').length > 0
-      ) {
-        messages.addMessage(
-          `paths.${pathName}`,
-          'Partial path templating is not allowed.',
-          'error'
-        );
-      }
-    });
-
     const parametersFromPath = path.parameters ? path.parameters.slice() : [];
 
     const availableParameters = parametersFromPath.map((param, i) => {

test/plugins/validation/2and3/paths.test.js

@@ -203,28 +203,6 @@ describe('validation plugin - semantic - paths', function() {
     });
 
     describe('Paths cannot have partial templates', () => {
-      it('should return one problem for an illegal partial path template', function() {
-        const spec = {
-          paths: {
-            '/CoolPath/user{id}': {
-              parameters: [
-                {
-                  name: 'id',
-                  in: 'path'
-                }
-              ]
-            }
-          }
-        };
-
-        const res = validate({ resolvedSpec: spec });
-        expect(res.errors.length).toEqual(1);
-        expect(res.errors[0].message).toEqual(
-          'Partial path templating is not allowed.'
-        );
-        expect(res.errors[0].path).toEqual('paths./CoolPath/user{id}');
-      });
-
       it('should return no problems for a correct path template', function() {
         const spec = {
           paths: {
@@ -267,30 +245,6 @@ describe('validation plugin - semantic - paths', function() {
     });
 
     describe('Integrations', () => {
-      it('should return one problem for an illegal query string in a path string', function() {
-        const spec = {
-          paths: {
-            '/report?rdate={relative_date}': {
-              parameters: [
-                {
-                  name: 'relative_date',
-                  in: 'path'
-                }
-              ]
-            }
-          }
-        };
-
-        const res = validate({ resolvedSpec: spec });
-        expect(res.errors.length).toEqual(1);
-        expect(res.errors[0].message).toEqual(
-          'Partial path templating is not allowed.'
-        );
-        expect(res.errors[0].path).toEqual(
-          'paths./report?rdate={relative_date}'
-        );
-      });
-
       it.skip('should return two problems for an equivalent path string missing a parameter definition', function() {
         const spec = {
           paths: {