Revert "2.6: document shorthand for v-bind .prop modifier"

This reverts commit f639b83.

Author: yyx990803

src/v2/api/index.md

@@ -2169,9 +2169,6 @@ type: api
   <!-- DOM attribute binding with prop modifier -->
   <div v-bind:text-content.prop="text"></div>
 
-  <!-- shorthand for DOM prop modifier (2.6.0+) -->
-  <div .text-content="text"></div>
-
   <!-- prop binding. "prop" must be declared in my-component. -->
   <my-component :prop="someThing"></my-component>
 

src/v2/guide/syntax.md

@@ -192,18 +192,6 @@ The `v-` prefix serves as a visual cue for identifying Vue-specific attributes i
 <a :[key]="url"> ... </a>
 ```
 
-#### DOM Property Shorthand
-
-In 2.6.0+, a separate shorthand for explicit DOM property bindings (with the `.prop` modifier) have been introduced:
-
-``` html
-<!-- full syntax -->
-<video v-bind:muted.prop="isMuted"> ... </video>
-
-<!-- shorthand -->
-<video .muted="isMuted"> ... </video>
-```
-
 ### `v-on` Shorthand
 
 ``` html