Merge pull request #36 from SkywalkingContrib/wu-sheng-patch-1

Remove logo and skywalking dev mail list

README.md

 # SkyWalking PHP
 
-<img src="https://skywalkingtest.github.io/page-resources/3.0/skywalking.png" alt="Sky Walking logo" height="90px" align="right" />
-
 SkyWalking PHP is the PHP instrumentation agent, which is compatible with [Apache SkyWalking(Incubating) APM](https://github.com/apache/incubator-skywalking) backend and others compatible agents/SDKs
 
 ## Documents
@@ -12,7 +10,6 @@ SkyWalking PHP is the PHP instrumentation agent, which is compatible with [Apach
 
 # Contact Us
 * Submit an issue
-* Mail list: dev@skywalking.apache.org
 * [Gitter](https://gitter.im/openskywalking/Lobby)
 * QQ Group: 392443393
 
@@ -21,4 +18,4 @@ SkyWalking PHP is the PHP instrumentation agent, which is compatible with [Apach
 
 A wide variety of companies and organizations use SkyWalking-PHP for research, production and commercial product. Here is the **User Wall** of SkyWalking-PHP.
 
-![Who Uses SkyWalking-PHP](./who-uses.jpg)
+![Who Uses SkyWalking-PHP](./who-uses.jpg)
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