Revert "Add httpcore dependency."

This reverts commit 4ee26c5.

Author: mpmadhavig

components/org.wso2.carbon.identity.oauth.endpoint/pom.xml

@@ -146,11 +146,6 @@
             <artifactId>org.wso2.carbon.identity.oidc.session</artifactId>
             <scope>provided</scope>
         </dependency>
-        <dependency>
-            <groupId>org.apache.httpcomponents</groupId>
-            <artifactId>httpcore</artifactId>
-        </dependency>
-
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>

pom.xml

@@ -665,12 +665,6 @@
                 <artifactId>tomcat-coyote</artifactId>
                 <version>${tomcat.version}</version>
             </dependency>
-            <dependency>
-                <groupId>org.apache.httpcomponents</groupId>
-                <artifactId>httpcore</artifactId>
-                <version>${httpcore.version}</version>
-            </dependency>
-
             <dependency>
                 <groupId>javax.ws.rs</groupId>
                 <artifactId>javax.ws.rs-api</artifactId>
@@ -1022,7 +1016,6 @@
         <tomcat.version>9.0.96</tomcat.version>
         <tomcat.wso2.imp.pkg.version.range>[9.0.0, 9.5.0)</tomcat.wso2.imp.pkg.version.range>
 
-        <httpcore.version>4.3.3.wso2v1</httpcore.version>
         <org.apache.cxf.version>3.5.9</org.apache.cxf.version>
         <encoder.wso2.version>1.2.0.wso2v1</encoder.wso2.version>
         <json-simple.version>1.1.wso2v1</json-simple.version>