Remove econml from pyproject.toml

Author: christopher-wild

pyproject.toml

@@ -16,7 +16,6 @@ license = { text = "MIT" }
 keywords = ["causal inference", "verification"]
 dependencies = [
     "z3_solver~=4.11.2", # z3_solver does not follow semantic versioning and tying to 4.11 introduces problems
-    "econml~=0.12",
     "fitter~=1.4",
     "lhsmdu~=1.1",
     "networkx~=2.6",