remove trial from features in build script

Author: siscia

release.py

@@ -22,10 +22,9 @@
 intel = "x86_64-unknown-linux-gnu"
 
 pro = "--features=pro" 
-trial = "--features=trial"
 
 for target in [arm, intel]:
-    for feature in ["", pro, trial]:
+    for feature in ["", pro]:
         cmd = "CARGO_TARGET_DIR={} cargo build --release --target {} {}".format(scratch_space, target, feature)
         print("Executing:", cmd)
         os.system(cmd)