Remove hack in #621 as no longer needed

Signed-off-by: Songlin Jiang <sjiang@igalia.com>

app/build.gradle

@@ -640,18 +640,6 @@ dependencies {
     geckoImplementation deps.gecko_view."${branch}_x86_64"
     geckoImplementation deps.gecko_view."${branch}_arm64"
     configurations.all {
-        // TODO(jfernandez): Instead of solving the conflicts this way, we would need to determine which packages
-        // are the culprit and define their dependencies so that we can let gradle to resolve them automatically.
-        // See https://docs.gradle.org/current/userguide/dependency_resolution.html for details.
-         resolutionStrategy.eachDependency { details ->
-            if (details.requested.group == 'org.jetbrains.kotlin'
-                    && details.requested.name.contains('kotlin-stdlib')) {
-                details.useVersion '1.4.10';
-            } else if (details.requested.group == 'org.jetbrains.kotlinx'
-                    && details.requested.name.contains('coroutines')) {
-                details.useVersion '1.4.2'
-            }
-         }
          resolutionStrategy.capabilitiesResolution.withCapability('org.mozilla.geckoview:geckoview') {
             def abi = getName().toLowerCase().contains('x86_64') ? 'x86_64' : 'arm64'
             def candidate = "geckoview-${branch}-${abi}"