[ruby/mysql] Don't test update with MySQL (#10595)

For MySQL batch update isn't supported, so there is no reason to compare
it with PostgreSQL.

Author: p8

frameworks/Ruby/rack-sequel/benchmark_config.json

@@ -6,7 +6,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "port": 8080,
         "approach": "Realistic",
         "classification": "Micro",
@@ -26,7 +25,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "port": 8080,
         "approach": "Realistic",
         "classification": "Micro",

frameworks/Ruby/roda-sequel/benchmark_config.json

@@ -7,7 +7,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "plaintext_url": "/plaintext",
         "port": 8080,
         "approach": "Realistic",

frameworks/Ruby/sinatra-sequel/benchmark_config.json

@@ -6,7 +6,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "port": 8080,
         "approach": "Realistic",
         "classification": "Micro",
@@ -46,7 +45,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "port": 8080,
         "approach": "Realistic",
         "classification": "Micro",

frameworks/Ruby/sinatra/benchmark_config.json

@@ -7,7 +7,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "plaintext_url": "/plaintext",
         "port": 8080,
         "approach": "Realistic",
@@ -49,7 +48,6 @@
         "db_url": "/db",
         "query_url": "/queries?queries=",
         "fortune_url": "/fortunes",
-        "update_url": "/updates?queries=",
         "plaintext_url": "/plaintext",
         "port": 8080,
         "approach": "Realistic",