Drop voltage setting from prepare_flash_access()

We do this unconditionally on flash-context creation now.

Change-Id: Ia7d2c65cf68e97ede6ab8bc89693ef1e3bc11078
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/489
diff --git a/flashprog.c b/flashprog.c
index 6e52bba..f1bad69 100644
--- a/flashprog.c
+++ b/flashprog.c
@@ -1648,12 +1648,6 @@
 		return 1;
 	}
 
-	if (flash->mst.common->adapt_voltage) {
-		if (flash->mst.common->adapt_voltage(flash->mst.common,
-				flash->chip->voltage.min, flash->chip->voltage.max))
-			return 1;
-	}
-
 	if (flash->chip->prepare_access && flash->chip->prepare_access(flash, PREPARE_FULL))
 		return 1;