ESRI:31491 should not use BETA2007.gsb grid

[don-vip]

10.8.0 changed the definition of ESRI:31491 to add +nadgrids=BETA2007.gsb:

 # Germany_Zone_1 [Germany Zone 1]
 # area: (lat: 55.24, 55.92) - (lon: 3.34, 4.5) [Germany - offshore North Sea west of 4.5~E]
-<31491> +proj=tmerc +ellps=bessel +x_0=1500000.0 +y_0=0.0 +lon_0=3dE +lat_0=0dN +k_0=1.0 +no_defs <>
+<31491> +proj=tmerc +ellps=bessel +x_0=1500000.0 +y_0=0.0 +lon_0=3dE +lat_0=0dN +k_0=1.0 +nadgrids=BETA2007.gsb +no_defs <>

Why? It doesn't work as the extents of the BETA2007 grid (continental Germany) are reported by gdalinfo as

Upper Left  (   5.4166667,  55.3500000) (  5d25' 0.00"E, 55d21' 0.00"N)
Lower Right (  15.7500000,  46.9500000) ( 15d45' 0.00"E, 46d57' 0.00"N)

but the extents of ESRI:31491 are outside of grid bounds, as they cover the dogger bank in North Sea:

[RJuergens]

resolved by using PCS extents for PCS entries