tests: Remove redundant test data related to last commit

There is no preprocessing required now.

tests/test_data/test_deployment/regions/EastAfrica/resources/source_gen/assets/preprocessed/EastAfrica_clusters_with_wheat_ha_MAPSPAM2017.cpg

-ISO-8859-1
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tests/test_data/test_deployment/regions/EastAfrica/resources/source_gen/assets/preprocessed/EastAfrica_clusters_with_wheat_ha_MAPSPAM2017.csv

-,id,REGION_ID,wheat_ha
-0,1,1,32090
-1,2,2,18463
-2,3,1,27731

tests/test_data/test_deployment/regions/EastAfrica/resources/source_gen/assets/preprocessed/EastAfrica_clusters_with_wheat_ha_MAPSPAM2017.prj

-PROJCS["WGS_1984_World_Mercator",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],UNIT["Meter",1.0]]
\ No newline at end of file