removed extra retrofit dependencies and it's extra usages

Author: KhushbooMer

imagekit-sdk/build.gradle

@@ -18,11 +18,9 @@ test {
 
 dependencies {
     compile 'commons-codec:commons-codec:1.13'
-    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
     implementation 'com.google.code.gson:gson:2.7'
     implementation 'com.squareup.okhttp3:okhttp:3.10.0'
     compile group: 'com.squareup.okio', name: 'okio', version: '1.14.0'
-    implementation 'com.squareup.retrofit2:retrofit:2.4.0'
     testCompile group: 'junit', name: 'junit', version: '4.12'
     testRuntimeOnly("org.junit.vintage:junit-vintage-engine:5.8.2")
     testCompile "org.mockito:mockito-all:2.+"

imagekit-sdk/src/main/java/io/imagekit/sdk/ImageKit.java

@@ -15,7 +15,6 @@
 import io.imagekit.sdk.tasks.Calculation;
 import io.imagekit.sdk.tasks.RestClient;
 import io.imagekit.sdk.tasks.UrlGen;
-import retrofit2.http.QueryMap;
 
 import java.util.List;
 import java.util.Map;