Remove duplicated documentation

docs/first_steps.md

@@ -171,22 +171,6 @@ And we display the initial data.
 
 \snippet{trimleft} uniform_heat_equation.cpp initial-display
 
-\snippet{trimleft} uniform_heat_equation.cpp time iteration
-
-To display the data, a chunk is created on the host using the \ref ddc::create_mirror function.
-
-\snippet{trimleft} uniform_heat_equation.cpp host-chunk
-
-We deepcopy the data from the `ghosted_last_temp` chunk to `ghosted_temp` on the host.
-
-\snippet{trimleft} uniform_heat_equation.cpp boundary conditions
-
-\snippet{trimleft} uniform_heat_equation.cpp initial-deepcopy
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-And we display the initial data.
-
-\snippet{trimleft} uniform_heat_equation.cpp initial-display
-
 For the numerical scheme, two chunkspans are created:
 
 * `next_temp` a span excluding ghosts of the temperature at the time-step we will build.