RUBY-1961 remove JRuby 9.1 support in bson-ruby due to it becoming an…

… undue burden (mongodb#145)

.evergreen/config.yml

@@ -523,21 +523,9 @@ axes:
         display_name: ruby-2.6
         variables:
            RVM_RUBY: "ruby-2.6"
-#      - id: "ruby-head"
-#        display_name: ruby-head
-#        variables:
-#           RVM_RUBY: "ruby-head"
   - id: "jruby-rubies"
     display_name: Ruby Version
     values:
-      #- id: "jruby-1.7"
-        #display_name: jruby-1.7
-        #variables:
-           #RVM_RUBY: "jruby-1.7"
-      - id: "jruby-9.1"
-        display_name: jruby-9.1
-        variables:
-           RVM_RUBY: "jruby-9.1"
       - id: "jruby-9.2"
         display_name: jruby-9.2
         variables:

.evergreen/run-tests.sh

@@ -5,7 +5,7 @@ set -o errexit  # Exit the script with error if any of the commands fail
 
 # Supported/used environment variables:
 #       RVM_RUBY      Define the Ruby version to test with, using its RVM identifier.
-#                     For example: "ruby-2.3" or "jruby-9.1"
+#                     For example: "ruby-2.3" or "jruby-9.2"
 
 . `dirname "$0"`/functions.sh
 

README.md

@@ -6,7 +6,7 @@ An implementation of the BSON specification in Ruby.
 Compatibility
 -------------
 
-BSON is tested against MRI (2.3+) and JRuby (9.1+).
+BSON is tested against MRI (2.3+) and JRuby (9.2+).
 
 Documentation
 -------------

docs/tutorials/bson-v4.txt

@@ -34,7 +34,7 @@ To install the gem with bundler, include the following in your Gemfile:
 
     gem 'bson', '~> 4.0'
 
-The BSON gem is compatible with MRI >= 2.3 and JRuby >= 9.1.
+The BSON gem is compatible with MRI >= 2.3 and JRuby >= 9.2.
 
 Use With ActiveSupport
 ----------------------