*.raml: Minimal fixes to avoid critical errors while raml2html

Avoid "Deprecated: mb_strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in tools/raml2html/vendor/raml-org/raml-php-parser/src/Parser.php on line 696"

Author: adriendupuis

docs/api/rest_api/rest_api_reference/input/ez-calendar.raml

@@ -81,7 +81,7 @@ displayName: Calendar
             description: A calendar action that e.g. reschedules or unschedules calendar events. The event type should always be copied from an event.
             headers:
                 Content-Type:
-                    description:
+                    #description:
                     example:  |
                         application/vnd.ibexa.api.calendar.future_publication.UnscheduleAction+json
             body:

docs/api/rest_api/rest_api_reference/input/ez-types.raml

@@ -1712,7 +1712,7 @@ UrlAlias:
             type: any
         path:
             description: 'The full path of the alias.'
-            type:
+            #type:
         languageCodes:
             description: 'The languageCodes for which this path is valid.'
             type: string[]
@@ -2321,7 +2321,7 @@ AttributeGroupCreate:
 
 AttributeGroupUpdate:
     type: object
-    description:
+    description: ''
 
 AttributeGroupList:
     type: object
@@ -2396,11 +2396,11 @@ ProductTypeUsage:
 
 ProductTypeCreate:
     type: object
-    description:
+    description: ''
 
 ProductTypeUpdate:
     type: object
-    description:
+    description: ''
 
 ProductTypeViewInput:
     type: object
@@ -2474,7 +2474,7 @@ RegionView:
 
 ProductTypeList:
     type: object
-    description:
+    description: ''
 
 TaxonomyEntryAssignToContent:
     type: object