[gnome-builder] meson-templates: Remove RUSTFLAGS env that causes build errors

[Christian Hergert <chergert src gnome org>]

commit 4feba253259c52c2fc2ff82c086021aa8e7d2d7c
Author: Ricardo Silva Veloso <ricvelozo gmail com>
Date:   Mon Feb 10 06:24:08 2020 -0300

    meson-templates: Remove RUSTFLAGS env that causes build errors

 src/plugins/meson-templates/resources/flatpak.json | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/src/plugins/meson-templates/resources/flatpak.json 
b/src/plugins/meson-templates/resources/flatpak.json
index df5a5e6ce..770ea827a 100644
--- a/src/plugins/meson-templates/resources/flatpak.json
+++ b/src/plugins/meson-templates/resources/flatpak.json
@@ -26,10 +26,9 @@
             "--share=network"
         ],
         "env" : {
-            "RUSTFLAGS" : "--remap-path-prefix =../ --error-format=human",
-            "CARGO_HOME" : "/run/build/{{name}}/cargo",
-            "RUST_BACKTRACE" : "1",
-            "RUST_LOG" : "{{name}}=debug"
+            "CARGO_HOME": "/run/build/{{name}}/cargo",
+            "RUST_BACKTRACE": "1",
+            "RUST_LOG": "{{name}}=debug"
         }
     },
 {{end}}