update README file

dependency-check-gradle/README.md

@@ -18,9 +18,7 @@ Current latest version is `0.0.7`
 
 ### Step 1, Apply dependency check gradle plugin
 
-Please refer to either one of the solution
-
-#### Solution 1，Install from Maven Central (Recommended)
+Install from Maven central repo
 
 ```groovy
 buildscript {
@@ -31,62 +29,13 @@ buildscript {
         classpath 'com.thoughtworks.tools:dependency-check:0.0.7'
     }
 }
-```
 
 apply plugin: 'dependency.check'
-
-#### Solution 2，Install from Gradle Plugin Portal
-
-[dependency check gradle plugin on Gradle Plugin Portal](https://plugins.gradle.org/plugin/dependency.check)
-
-**Build script snippet for new, incubating, plugin mechanism introduced in Gradle 2.1:**
-
-```groovy
-plugins {
-    id "dependency.check" version "0.0.7"
-}
-```
-
-**Build script snippet for use in all Gradle versions:**
-
-```groovy
-buildscript {
-  repositories {
-    maven {
-      url "https://plugins.gradle.org/m2/"
-    }
-  }
-  dependencies {
-    classpath "gradle.plugin.com.tools.security:dependency-check:0.0.7"
-  }
-}
-
-apply plugin: "dependency-check"
-```
-
-#### Solution 3，Install from Bintray
-
-```groovy
-apply plugin: "dependency-check"
-
-buildscript {
-    repositories {
-        maven {
-            url 'http://dl.bintray.com/wei/maven'
-        }
-        mavenCentral()
-    }
-    dependencies {
-        classpath(
-                'com.tools.security:dependency-check:0.0.7'
-        )
-    }
-}
 ```
 
 ### Step 2, Run gradle task
 
-Once gradle plugin applied, run following gradle task to check the dependencies:
+Once gradle plugin applied, run following gradle task to check dependencies:
 
 ```
 gradle dependencyCheck