Update to latest MIT brand

Why are these changes being introduced:

*

Relevant ticket(s):

* https://mitlibraries.atlassian.net/browse/PW-68

How does this address that need:

* Updates to latest mitlibraries-theme gem

Document any side effects to this change:

* Updates a local fallback favicon
* Removes some unused additional favicons

Gemfile

@@ -21,7 +21,7 @@ gem 'importmap-rails'
 # Build JSON APIs with ease [https://github.com/rails/jbuilder]
 gem 'jbuilder'
 
-gem 'mitlibraries-theme', git: 'https://github.com/mitlibraries/mitlibraries-theme', tag: 'v1.0.2'
+gem 'mitlibraries-theme', git: 'https://github.com/mitlibraries/mitlibraries-theme', tag: 'v1.1'
 
 # Use the Puma web server [https://github.com/puma/puma]
 gem 'puma', '>= 5.0'

Gemfile.lock

@@ -1,7 +1,7 @@
 GIT
   remote: https://github.com/mitlibraries/mitlibraries-theme
-  revision: bbd5bb9f8f977251651a41be47b59aa5bd1b22c1
-  tag: v1.0.2
+  revision: 93b931b802485f9e35a6878f957b3fd88ae3b294
+  tag: v1.1
   specs:
     mitlibraries-theme (1.0.2)
       rails (>= 6, < 8)
@@ -91,7 +91,7 @@ GEM
       rake (>= 10.4, < 14.0)
     ast (2.4.2)
     base64 (0.2.0)
-    bigdecimal (3.1.4)
+    bigdecimal (3.1.5)
     bindex (0.8.1)
     bootsnap (1.17.0)
       msgpack (~> 1.2)
@@ -147,8 +147,8 @@ GEM
       actionpack (>= 6.0.0)
       activesupport (>= 6.0.0)
       railties (>= 6.0.0)
-    io-console (0.6.0)
-    irb (1.9.0)
+    io-console (0.7.1)
+    irb (1.10.1)
       rdoc
       reline (>= 0.3.8)
     jbuilder (2.11.5)
@@ -173,7 +173,7 @@ GEM
     minitest (5.20.0)
     msgpack (1.7.2)
     mutex_m (0.2.0)
-    net-imap (0.4.5)
+    net-imap (0.4.8)
       date
       net-protocol
     net-pop (0.1.2)
@@ -182,12 +182,12 @@ GEM
       timeout
     net-smtp (0.4.0)
       net-protocol
-    nio4r (2.6.0)
-    nokogiri (1.15.4-arm64-darwin)
+    nio4r (2.7.0)
+    nokogiri (1.15.5-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.4-x86_64-darwin)
+    nokogiri (1.15.5-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.4-x86_64-linux)
+    nokogiri (1.15.5-x86_64-linux)
       racc (~> 1.4)
     parallel (1.23.0)
     parser (3.2.2.4)
@@ -239,10 +239,10 @@ GEM
       zeitwerk (~> 2.6)
     rainbow (3.1.1)
     rake (13.1.0)
-    rdoc (6.6.0)
+    rdoc (6.6.2)
       psych (>= 4.0.0)
     regexp_parser (2.8.2)
-    reline (0.4.0)
+    reline (0.4.1)
       io-console (~> 0.5)
     rexml (3.2.6)
     rubocop (1.57.2)
@@ -298,7 +298,7 @@ GEM
     sqlite3 (1.6.8-x86_64-linux)
     stimulus-rails (1.3.0)
       railties (>= 6.0.0)
-    stringio (3.0.9)
+    stringio (3.1.0)
     thor (1.3.0)
     tilt (2.3.0)
     timeout (0.4.1)