[java] Remove deprecated "platform" JWP capability

Author: diemol

java/src/org/openqa/selenium/Capabilities.java

@@ -35,7 +35,7 @@ default String getBrowserName() {
   }
 
   default Platform getPlatformName() {
-    return Stream.of("platform", "platformName")
+    return Stream.of("platformName")
       .map(this::getCapability)
       .filter(Objects::nonNull)
       .map(cap -> {

java/src/org/openqa/selenium/grid/data/DefaultSlotMatcher.java

@@ -96,7 +96,7 @@ private Boolean initialMatch(Capabilities stereotype, Capabilities capabilities)
       // Matching of extension capabilities is implementation independent. Skip them
       .filter(name -> !name.contains(":"))
       // Platform matching is special, we do it later
-      .filter(name -> !"platform".equalsIgnoreCase(name) && !"platformName".equalsIgnoreCase(name))
+      .filter(name -> !"platformName".equalsIgnoreCase(name))
       .map(name -> {
         if (capabilities.getCapability(name) instanceof String) {
           return stereotype.getCapability(name).toString()

java/src/org/openqa/selenium/remote/CapabilityType.java

@@ -22,11 +22,6 @@
  */
 public interface CapabilityType {
 
-  /**
-   * @deprecated Use {@link CapabilityType#PLATFORM_NAME}
-   */
-  @Deprecated
-  String PLATFORM = "platform";
   /**
    * @deprecated Non W3C compliant
    */