fix: remove deprecated workspace_template from mock target configs

The workspace_template field was removed from target definitions.
These mock targets relied on it but the eval files already define
workspace.template at the eval level.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: christso

examples/features/file-changes-graders/.agentv/targets.yaml

@@ -8,7 +8,6 @@ targets:
       printf "export function add(a: number, b: number): number {\n  return a + b;\n}\n\nexport function subtract(a: number, b: number): number {\n  return a - b;\n}\n" > src/calculator.ts &&
       echo "Added subtract function to calculator.ts" > {OUTPUT_FILE}
       '
-    workspace_template: ../workspace-template
     grader_target: azure_grader
 
   # Azure OpenAI — used as LLM grader (rubrics) and built-in llm-grader provider

examples/features/file-changes/.agentv/targets.yaml

@@ -13,4 +13,3 @@ targets:
       rm obsolete.log &&
       echo "Done: edited 2 files, created 2 files, deleted 1 file." > {OUTPUT_FILE}
       '
-    workspace_template: ../workspace-template

examples/features/functional-grading/.agentv/targets.yaml

@@ -8,4 +8,3 @@ targets:
       printf "export function add(a: number, b: number): number {\n  return a + b;\n}\n\nexport function multiply(a: number, b: number): number {\n  return a * b;\n}\n\nexport function fibonacci(n: number): number {\n  if (n <= 1) return n;\n  let a = 0, b = 1;\n  for (let i = 2; i <= n; i++) {\n    const tmp = a + b;\n    a = b;\n    b = tmp;\n  }\n  return b;\n}\n" > src/index.ts &&
       echo "Implemented add, multiply, and fibonacci functions." > {OUTPUT_FILE}
       '
-    workspace_template: ../workspace-template