[Retrace] Remove unused method and clean up comment

Change-Id: I1afa0d057411da0a5627183e2768883636e29976
diff --git a/src/main/java/com/android/tools/r8/retrace/Retrace.java b/src/main/java/com/android/tools/r8/retrace/Retrace.java
index 0b02310..813ae66 100644
--- a/src/main/java/com/android/tools/r8/retrace/Retrace.java
+++ b/src/main/java/com/android/tools/r8/retrace/Retrace.java
@@ -160,14 +160,6 @@
     this.isVerbose = isVerbose;
   }
 
-  public static <T, ST extends StackTraceElementProxy<T, ST>> Retrace<T, ST> createRetrace(
-      StackTraceLineParser<T, ST> stackTraceLineParser,
-      StackTraceElementProxyRetracer<T, ST> proxyRetracer,
-      DiagnosticsHandler diagnosticsHandler,
-      boolean isVerbose) {
-    return new Retrace<>(stackTraceLineParser, proxyRetracer, diagnosticsHandler, isVerbose);
-  }
-
   /**
    * Retraces a stack frame and calls the consumer for each retraced line
    *
diff --git a/src/main/java/com/android/tools/r8/retrace/StringRetrace.java b/src/main/java/com/android/tools/r8/retrace/StringRetrace.java
index 957e357..825ac52 100644
--- a/src/main/java/com/android/tools/r8/retrace/StringRetrace.java
+++ b/src/main/java/com/android/tools/r8/retrace/StringRetrace.java
@@ -47,7 +47,7 @@
   }
 
   /**
-   * Retraces a list of stack-traces strings and returns a list. Ambiguous and inline frames will be
+   * Retraces a list of stack-trace lines and returns a list. Ambiguous and inline frames will be
    * appended automatically to the retraced string.
    *
    * @param stackTrace the incoming stack trace