Remove obsolete Ruby version requirement notes (#484)

lib/mini_profiler/profiler.rb

@@ -639,13 +639,13 @@ def help(client_settings, env)
   #{make_link "full-backtrace", env} #{"(*) " if client_settings.backtrace_full?}: enable full backtraces for SQL executed (use pp=normal-backtrace to disable)
   #{make_link "disable", env} : disable profiling for this session
   #{make_link "enable", env} : enable profiling for this session (if previously disabled)
-  #{make_link "profile-gc", env} : perform gc profiling on this request, analyzes ObjectSpace generated by request (ruby 1.9.3 only)
+  #{make_link "profile-gc", env} : perform gc profiling on this request, analyzes ObjectSpace generated by request
   #{make_link "profile-memory", env} : requires the memory_profiler gem, new location based report
-  #{make_link "flamegraph", env} : requires Ruby 2.2, a graph representing sampled activity (requires the stackprof gem).
+  #{make_link "flamegraph", env} : a graph representing sampled activity (requires the stackprof gem).
   #{make_link "flamegraph&flamegraph_sample_rate=1", env}: creates a flamegraph with the specified sample rate (in ms). Overrides value set in config
-  #{make_link "flamegraph_embed", env} : requires Ruby 2.2, a graph representing sampled activity (requires the stackprof gem), embedded resources for use on an intranet.
-  #{make_link "trace-exceptions", env} : requires Ruby 2.0, will return all the spots where your application raises exceptions
-  #{make_link "analyze-memory", env} : requires Ruby 2.0, will perform basic memory analysis of heap
+  #{make_link "flamegraph_embed", env} : a graph representing sampled activity (requires the stackprof gem), embedded resources for use on an intranet.
+  #{make_link "trace-exceptions", env} : will return all the spots where your application raises exceptions
+  #{make_link "analyze-memory", env} : will perform basic memory analysis of heap
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