Get rid of redundant dependency (#10835)

Signed-off-by: Anatoliy Bazko <abazko@redhat.com>

plugins/plugin-java/che-plugin-java-ext-lang-server/pom.xml

@@ -61,10 +61,6 @@
             <groupId>org.eclipse.che.plugin</groupId>
             <artifactId>che-plugin-java-ext-lang-shared</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.eclipse.che.plugin</groupId>
-            <artifactId>org.eclipse.core.filebuffers</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.eclipse.che.plugin</groupId>
             <artifactId>org.eclipse.core.resources</artifactId>

plugins/plugin-java/che-plugin-java-ext-lang-server/src/main/java/org/eclipse/che/plugin/java/server/inject/JdtGuiceModule.java

@@ -18,7 +18,6 @@ import com.google.inject.name.Named;
 import java.nio.file.Paths;
 import org.eclipse.che.inject.DynaModule;
 import org.eclipse.che.plugin.java.server.rest.JavaFormatterService;
-import org.eclipse.core.internal.filebuffers.FileBuffersPlugin;
 import org.eclipse.core.resources.ResourcesPlugin;
 
 /** @author Evgen Vidolob */
@@ -29,7 +28,6 @@ public class JdtGuiceModule extends AbstractModule {
   protected void configure() {
     bind(JavaFormatterService.class);
     bind(ResourcesPlugin.class).asEagerSingleton();
-    bind(FileBuffersPlugin.class).asEagerSingleton();
   }
 
   @Provides

pom.xml

@@ -1886,11 +1886,6 @@
                 <artifactId>maven-server-impl</artifactId>
                 <version>${che.version}</version>
             </dependency>
-            <dependency>
-                <groupId>org.eclipse.che.plugin</groupId>
-                <artifactId>org.eclipse.core.filebuffers</artifactId>
-                <version>${che.version}</version>
-            </dependency>
             <dependency>
                 <groupId>org.eclipse.che.plugin</groupId>
                 <artifactId>org.eclipse.core.filesystem</artifactId>