Cleanup history.py and update documentation

docs/bot-usage.md

@@ -184,10 +184,6 @@ optional arguments:
                         Specify max_open_trades to use.
   --stake_amount STAKE_AMOUNT
                         Specify stake_amount.
-  -r, --refresh-pairs-cached
-                        Refresh the pairs files in tests/testdata with the
-                        latest data from the exchange. Use it if you want to
-                        run your optimization commands with up-to-date data.
   --eps, --enable-position-stacking
                         Allow buying the same pair multiple times (position
                         stacking).
@@ -245,10 +241,6 @@ optional arguments:
                         Specify max_open_trades to use.
   --stake_amount STAKE_AMOUNT
                         Specify stake_amount.
-  -r, --refresh-pairs-cached
-                        Refresh the pairs files in tests/testdata with the
-                        latest data from the exchange. Use it if you want to
-                        run your optimization commands with up-to-date data.
   --customhyperopt NAME
                         Specify hyperopt class name (default:
                         `DefaultHyperOpts`).
@@ -310,10 +302,6 @@ optional arguments:
                         Specify max_open_trades to use.
   --stake_amount STAKE_AMOUNT
                         Specify stake_amount.
-  -r, --refresh-pairs-cached
-                        Refresh the pairs files in tests/testdata with the
-                        latest data from the exchange. Use it if you want to
-                        run your optimization commands with up-to-date data.
   --stoplosses STOPLOSS_RANGE
                         Defines a range of stoploss against which edge will
                         assess the strategy the format is "min,max,step"

docs/deprecated.md

@@ -4,7 +4,7 @@ This page contains description of the command line arguments, configuration para
 and the bot features that were declared as DEPRECATED by the bot development team
 and are no longer supported. Please avoid their usage in your configuration.
 
-## Deprecated
+## Removed features
 
 ### the `--refresh-pairs-cached` command line option
 
@@ -12,9 +12,7 @@ and are no longer supported. Please avoid their usage in your configuration.
 Since this leads to much confusion, and slows down backtesting (while not being part of backtesting) this has been singled out 
 as a seperate freqtrade subcommand `freqtrade download-data`.
 
-This command line option was deprecated in `2019.7-dev` and will be removed after the next release.
-
-## Removed features
+This command line option was deprecated in `2019.7-dev` and removed in `2019-9`
 
 ### The **--dynamic-whitelist** command line option