[FIX] Remove task entity from DWI and PERF time series file templates (…

…#1703)

* fix physio

* allow stim

src/schema/rules/files/raw/task.yaml

@@ -38,6 +38,25 @@ timeseries:
     run: optional
     recording: optional
 
+timeseries__mri_no_task:
+  suffixes:
+    - physio
+    - stim
+  extensions:
+    - .tsv.gz
+    - .json
+  datatypes:
+    - dwi
+    - perf
+  entities:
+    subject: required
+    session: optional
+    acquisition: optional
+    run: optional
+    reconstruction: optional
+    direction: optional
+    recording: optional
+
 # Specializations
 # In these rules, we use $ref to retrieve most of an object, and then override
 
@@ -72,23 +91,15 @@ events__pet:
     reconstruction: optional
     run: optional
 
-timeseries__mri:
-  $ref: rules.files.raw.task.timeseries
-  datatypes:
-    - dwi
-    - perf
-  entities:
-    $ref: rules.files.raw.task.timeseries.entities
-    reconstruction: optional
-    direction: optional
-
 timeseries__func:
   $ref: rules.files.raw.task.timeseries
   datatypes:
     - func
   entities:
-    $ref: rules.files.raw.task.timeseries__mri.entities
+    $ref: rules.files.raw.task.timeseries.entities
     ceagent: optional
+    reconstruction: optional
+    direction: optional
 
 timeseries__meg:
   $ref: rules.files.raw.task.timeseries