Remove algo_strength.

FIPS is the same as HIGH (but for CHACHA20), so those are redundant.
Likewise, MEDIUM vs HIGH was just RC4. Remove those in favor of
redefining those legacy rules to mean this.

One less field to keep track of in each cipher.

Change-Id: I2b2489cffb9e16efb0ac7d7290c173cac061432a
Reviewed-on: https://boringssl-review.googlesource.com/6515
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/ssl/ssl_test.cc b/ssl/ssl_test.cc
index 786c3ca..065efc0 100644
--- a/ssl/ssl_test.cc
+++ b/ssl/ssl_test.cc
@@ -250,6 +250,8 @@
   "DEFAULT",
   "ALL:!eNULL",
   "ALL:!NULL",
+  "MEDIUM",
+  "HIGH",
   "FIPS",
   "SHA",
   "SHA1",