Remove bad example

Author: mborland

doc/modules/ROOT/pages/financial_examples.adoc

@@ -31,10 +31,6 @@ In the examples folder there is a file named `moving_average.cpp`.
 This example shows how to parse historical stock data from a file and use it.
 This serves as a framework for other calculations for securities.
 
-== Currency Conversion
-In the examples folder there is a file named `currency_conversion.cpp`.
-This example shows how to simply convert currencies based off a given exchange rate.
-
 [#examples_boost_math]
 == Boost.Math Integration
 

examples/currency_conversion.cpp

@@ -200,7 +200,6 @@ run ../examples/literals.cpp ;
 run ../examples/rounding_mode.cpp ;
 run ../examples/rounding_mode_compile_time.cpp ;
 run ../examples/moving_average.cpp ;
-run ../examples/currency_conversion.cpp ;
 run ../examples/statistics.cpp ;
 run ../examples/format.cpp ;
 run ../examples/fmt_format.cpp ;