[NI] Extract interface InferenceSession to a separate file

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/InferenceSession.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.resolve.calls.components
+
+import org.jetbrains.kotlin.resolve.calls.model.CallResolutionResult
+
+interface InferenceSession {
+    companion object {
+        val default = object : InferenceSession {
+            override fun shouldFixTypeVariables(): Boolean = false
+            override fun addPartiallyResolvedCall(call: CallResolutionResult) {}
+        }
+    }
+
+    fun shouldFixTypeVariables(): Boolean
+    fun addPartiallyResolvedCall(call: CallResolutionResult)
+}

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/KotlinCallCompleter.kt

@@ -176,15 +176,3 @@ class KotlinCallCompleter(
         )
     }
 }
-
-interface InferenceSession {
-    companion object {
-        val default = object : InferenceSession {
-            override fun shouldFixTypeVariables(): Boolean = false
-            override fun addPartiallyResolvedCall(call: CallResolutionResult) {}
-        }
-    }
-
-    fun shouldFixTypeVariables(): Boolean
-    fun addPartiallyResolvedCall(call: CallResolutionResult)
-}