chore: tf and torch are not optional

pyproject.toml

@@ -14,10 +14,10 @@ packages = [{ include = "qiboml", from = "src" }]
 python = ">=3.9,<3.13"
 numpy = "^1.26.4"
 keras = { version = "^3.0.0", optional = true }
-tensorflow = { version = "^2.16.1", markers = "sys_platform == 'linux' or sys_platform == 'darwin'", optional = true }
+tensorflow = { version = "^2.16.1", markers = "sys_platform == 'linux' or sys_platform == 'darwin'"}
 # TODO: the marker is a temporary solution due to the lack of the tensorflow-io 0.32.0's wheels for Windows, this package is one of
 # the tensorflow requirements
-torch = { version = "^2.3.1", optional = true }
+torch = { version = "^2.3.1"}
 qibo = {git="https://github.com/qiboteam/qibo"}
 jax = "^0.4.25"
 jaxlib = "^0.4.25"
@@ -33,8 +33,6 @@ pdbpp = "^0.10.3"
 optional = true
 
 [tool.poetry.group.tests.dependencies]
-torch = "^2.3.1"
-tensorflow = { version = "^2.16.1", markers = "sys_platform == 'linux'" }
 pytest = "^7.2.1"
 pylint = "3.1.0"
 pytest-cov = "4.0.0"